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B20Check Token Legitimacy Verifier
x402
B20Check Token Legitimacy Verifier is a paid API for AI agents from b20check.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Verifies whether a Base blockchain address is a legitimate factory-native B20 token, detecting copycats, impersonators, and reporting live issuer risk powers with a signed EIP-712 verdict.
Price / call$0.01
Success—
StatusUnknown
How this service works
Legitimacy check for B20 tokens on Base. Verifies whether an address is a factory-native B20, detects copycats and known-asset imposters (homoglyph-aware), reports live issuer powers (mint, burn, pause, freeze, seize, admin) and issuer activity, and returns a danger/caution/ok verdict as an EIP-712-signed attestation an agent can independently verify.
Output
Returns a signed EIP-712 attestation containing a three-tier verdict (danger/caution/ok), whether the address is a factory-native B20, copycat and homoglyph impersonation detection results, a live report of issuer powers (mint, burn, pause, freeze, seize, admin), and recent issuer activity. The signature can be independently verified on-chain.
Example use cases
Pre-trade token safety check
“I'm about to trade a B20 token at address 0xAbCd1234...5678 on Base — can you verify it's a legitimate factory-native token and not a copycat, and tell me what issuer powers it has before I put money in?”
Detecting homoglyph imposters
“This token calls itself 'USDC' but the contract is 0x9988...aabb — can you check if it's actually a known-asset imposter using homoglyph tricks and give me a signed danger/caution/ok verdict?”
DeFi bot risk screening
“Screen the B20 token at 0xDeF0...1122 on Base for me — I need to know if the issuer can still mint, pause, or seize tokens, and whether there's been any recent issuer activity, so I can decide if it's safe to add to my portfolio.”
Technical details
Endpoint
GEThttps://b20check.com/v1/verify/:addressWhen to prefer
Use this endpoint when you need to assess the legitimacy and risk profile of a specific B20 token on the Base blockchain before trading or integrating it, especially when you need a cryptographically verifiable (EIP-712 signed) verdict that can be independently validated. Prefer this over generic token scanners when you specifically need B20 factory-native verification, homoglyph-aware impersonation detection, or live issuer power reporting on Base.
Side effects
- Invalid or malformed contract address returns an error response
- Address not found on Base network returns not-found error
- Non-B20 contract address may return a danger verdict or unsupported error
- Network congestion on Base may cause delayed or timeout responses
- Rate limiting if too many requests are made without payment
Tags
x402
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